Narrow-leaved lupin
Lupinus angustifolius · Fabaceae
The gardener's calendar
Ideal time to plant narrow-leaved lupin: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous
- Flowering
- Spring to early summer (April-June)
- Adult size
- 40-60 cm tall
- Growth
- Fast
- Hardiness
- Down to -15°C
- Origin
- Mediterranean basin and Asia Minor
- Soil type
- Well-drained, slightly acidic to neutral
Care
Light Exposure
Narrow-leaved lupine thrives in full sun, ideally a minimum of 6 hours per day. A south or west-facing exposure promotes generous flowering and intense flower colors. It tolerates partial shade but will flower less abundantly.
Watering
Water regularly during growth and flowering, keeping the soil moist but not saturated. Once established, lupine tolerates drought well thanks to its deep root system. Reduce watering in winter.
Soil
Well-drained soil that is slightly acidic to neutral is preferable. Avoid compacted soils and excessive lime deposits. Adding well-decomposed compost at planting improves soil structure and initial growth.
Pruning and Deadheading
Remove spent flowers regularly to extend flowering and prevent unwanted self-seeding. After flowering, cut stems close to the ground. No winter pruning is necessary.
Fertilizer
As a legume, lupine fixes atmospheric nitrogen and doesn't require nitrogen-rich fertilizer. A moderate application of balanced fertilizer in spring suffices, or let nature take its course if the soil is properly prepared.
Diseases and Pests
Lupine is generally robust but can be affected by powdery mildew in humid conditions. Promote air circulation and avoid wetting the foliage. Aphids may appear; a spray of water or mild soap usually suffices.
Did you know?
Narrow-leaved lupine was cultivated in Greco-Roman antiquity not only for its ornamental flowers, but also as a forage crop and to improve soil fertility. Today, its seeds are processed into plant-based proteins for human and animal food, making lupine both a botanical and agronomic ally for sustainable gardens.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
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Tips generated and checked by Viridia — adapt them to your local climate.